d4388fe67304dee3b80fdea5f2501450a16299d5 - pub/scm/linux/kernel/git/ast/bpf

commit: d4388fe67304dee3b80fdea5f2501450a16299d5
[log] [tgz]
author: Alexei Starovoitov <ast@kernel.org>
Thu Dec 05 21:50:54 2019 -0800
committer: Alexei Starovoitov <ast@kernel.org>
Thu Dec 05 22:03:34 2019 -0800
tree: b0a2eec0cb6930a80a874c0df32158adff19e68e
parent: 670101553af7d9560e1a60a8aa87bdf9185e6b89 [diff]

ftrace: Fix function_graph tracer interaction with BPF trampoline

Depending on type of BPF programs served by BPF trampoline it can call original
function and may skip frame. That will confuse function_graph tracer and will
cause crashes with bad RIP. Teach graph tracer to skip function that are served
by BPF trampoline.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

arch/x86/kernel/ftrace.c[diff]
include/linux/ftrace.h[diff]
kernel/trace/fgraph.c[diff]
kernel/trace/ftrace.c[diff]

4 files changed

tree: b0a2eec0cb6930a80a874c0df32158adff19e68e